It seems the following corrections of **src/callback.c** would be sufficient (marked with //apl):
``` void on_context_action1_activate(GtkMenuItem *menuitem, gpointer user_data) <...> /* substitute the wildcard %s and run the command if it is non empty */ //apl if (G_LIKELY(!EMPTY(command))) { gchar *command_line = g_strdup(command); command_line = build_replace_placeholder(doc, command_line); //apl utils_str_replace_all(&command_line, "%s", word); <...> ```